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Pull the intake tube and clean the throttle body and plate. You may have carbon in the throttle body that is restricting the air flow causing your low idle problem.
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No, the MAF does not affect the AC, No way to adjust idle speed, it is controlled by the IAC valve.
You might have a problem with the AC compressor, if it is binding at idle, it could be causing the idle to drop. You could take off the drive belt and verify all pulleys and accessories are easy to turn by hand.
I use a scan tool to test the IAC valve, you can open and close it with a scan tool and verify idle speed is following. The ac is probably not related, since you said the problem started after cleaning the parts. Are you getting any engine lights on?
Your Iac valve could be the problem, also check the engine over for any vacuum leaks.
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